Low voltage insulation monitoring system i-moni-ZE-1NF
Low voltage insulation monitoring system i-moni-ZE-1NB
Low voltage insulation monitoring system i-moni-ZE-1RF
Low voltage insulation monitoring system i-moni-ZE-1RB
Low voltage insulation monitoring system i-moni-ZE-2NF
Low voltage insulation monitoring system i-moni-ZE-2NB
Low voltage insulation monitoring system i-moni-ZE-2RF
Low voltage insulation monitoring system i-moni-Kyushu Kiden Co., Ltd.

Low voltage insulation monitoring system i-moni
Kyushu Kiden Co., Ltd.


About This Product

■Summary Eliminate wasted energy due to sudden accidents. Extending annual inspections significantly reduces test costs. Leave the preventive maintenance of electrical equipment essential to factories and buildings to Hitachi Low Voltage Insulation Monitoring System. ■Advantages of introducing insulation monitoring ・24-hour monitoring eliminates the need for power outages. ・Early detection of signs of insulation deterioration and proactive management possible. (Preventive maintenance) ・Insulation resistance test during annual inspection can be reduced. ■Economical and space saving -Multi-circuit insulation monitoring unit facilitates construction and saves space. The cost per circuit can also be reduced. ・It is economical and saves space because no voltage superimposition device is required. It does not affect the electrical circuit or load. ■Stable operation using the same detection method as earth leakage circuit breakers ・Similar to proven earth leakage circuit breakers, this is a highly reliable method that uses the magnitude of the detected leakage current as is. - To judge the insulation state, the "leakage current fundamental wave component", which is obtained by removing harmonic components from the detected leakage current, is used. ■Appropriate monitoring of effective leakage current depending on the type of circuit ・Single-phase and three-phase - △ Connection (S phase grounding): The fundamental wave capacitor component (I0r) shows a large value, so monitor the fundamental wave effective component I0r. ・Three-phase - Y connection (neutral point grounded): Monitored by fundamental wave I0 (≒I0r). Since the total fundamental wave capacitor component (I0c) of each phase is extremely small, monitoring the fundamental wave means monitoring the effective fundamental wave component. ■Data can be collected using H-NET standard software ・Standard software for the power distribution and utility monitoring system (H-NET) allows for easy proactive management by continuously collecting data and understanding trends. ・It is possible to narrow down lines with insulation deterioration by analyzing the operating status of equipment. There are other model numbers as well.

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    Low voltage insulation monitoring system i-moni

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10 Models of Low voltage insulation monitoring system i-moni

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Product Image Part Number Price (excluding tax) Communication interface Communication protocol Compliant standards Detection current Display Measured value Display Monitored value (warning, caution) Earth leakage display method Input adaptive circuit Item Measurement item Fundamental leakage current (Io) Measurement item Fundamental wave effective leakage current (Ior) Meter measurement range Monitoring Fault output Monitoring Monitoring level Monitoring alarm output Number of input voltage systems Output item Effective leakage current monitoring circuit Output item Fundamental wave leakage current monitoring circuit Rated inertial dead time Rated non-operating current Rated operating time Rated sensitivity current Relay contact configuration Return method Setting Monitoring value (warning, caution) Setting ZCT type Setting voltage system (phase wire system) Testing mechanism Tolerance Effective leakage current (Ior) Tolerance Fundamental leakage current (Io)
Low voltage insulation monitoring system i-moni-Part Number-ZE-1NF

ZE-1NF

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 1 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-1NB

ZE-1NB

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 1 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-1RF

ZE-1RF

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 1 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-1RB

ZE-1RB

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 1 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-2NF

ZE-2NF

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 2 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-2NB

ZE-2NB

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 2 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-2RF

ZE-2RF

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 2 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-2RB

ZE-2RB

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 2 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-6NF3

ZE-6NF3

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 6 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA
Low voltage insulation monitoring system i-moni-Part Number-ZE-6NB3

ZE-6NB3

Available upon quote RS-485 H-NET, Modbus®/RTU JISC8374:1991 Earth leakage relay Detection current similar to conventional earth leakage relays Fundamental leakage current, effective leakage current 0.0~999.9mA (all over 1000mA will be displayed as OL) If display of effective leakage current is selected in the circuit that monitors fundamental leakage current, "----" will be displayed I will 2~999mA (Circuit not monitored will display default 1000mA) Light emitting diode (LED: red) Low voltage circuit with line voltage AC440V or less (transformer grounding wire, each feeder) 50/60Hz 6 circuit product 0~999.9mA ZCT output current (leakage current) minus DC and harmonic components Extraction of the effective component of the fundamental wave (component in phase with the ground phase voltage) 0~999.9mA If 1000mA or more is detected, the measurement will be over. Relay a contact x 1 (ERR) You can set the warning level and caution level for each circuit (please set it so that warning ≥ caution) Relay A contact x 2 per circuit (warning, caution)
If the follow-up action earth leakage relay function is included, there is also 1 a contact for each circuit.
1 system: 1 circuit product, 6 circuits/10 circuits with earth leakage relay function
2 systems: Other than above
Analog output of effective leakage current measurement value Analog output of fundamental wave leakage current measurement value 1,0.5,0.25,0.15,0.1 seconds 1,000, 500, 250, 100, 50mA 2,1,0.5,0.3,0.2 seconds time delay type 2,000, 1,000, 500, 200, 100mA A contact (normally open) Manual recovery using the reset button (reset method for each circuit) 2~999mA (Set unmonitored circuits to default 1000mA) Model selection (ZR series, ZCT built-in fuse-free circuit breaker, etc.) Three-phase three-wire (△): Monitors effective leakage current
Single-phase 2-wire/3-wire: Monitors effective leakage current
Others (3-phase 3-wire (Y), 3-phase 4-wire): Monitors fundamental wave leakage current.
Manual test using test button (test method for each circuit) ±10% of fundamental wave leakage current ±1mA Indication value error ±5% ±1mA

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